Automatically threading loom shuttle



Dec. 15, 1931. v. LINDSJO AU'I'OM AIICALLY THREADING LOOM SHUTTLE Original Filed Feb. 10, 1950 2 Sheets-Sheet 1 m VENTo-R:

ATTORNEY I I u Dec. 15, 1931. v. LINDSJO 1,837,166

AUTOMATICALLY THREADING LOOM SHUTTLE- Original Filed Feb. 10, 1950 2' Sheets-Sheet 2 N HVWFNTOR ATTORNEY Patented Dec. 15, 1931 UNITED STATES PATENT. OFFICE,

VERNER LINDSIJO, or HOPEDALE, MASSAoHUsETTS, ASSIGNOR To sw n CORPORA- TION, or HOPED'ALE, MASSACHUSETTS, AVCORPORA'I'ION or MAINE AUTOMATICALLY THnEAnmG LOOM SHUT LE Applicationfiled February lo, 1980, Serial No. 427,195. Renewed October 22; 1931.

This invention relates to automatically threading loom shuttles in which the filling to time, it is desirable that the incomingfilh' 1o ing thread shall have imparted thereto the same tension on the first pick of the shuttle following replenishment as exists during subsequent weaving, otherwise the cloth is. iable to show defects which are particularly .ob-

servable in. weaving: with certain kinds or characters of filling. A solution of this problem has heretofore been attempted with only a fair degree .of satisfaction, owing to the character of the thread tensioning mechanism. Z a

One of the important features of the present invention therefore consists in thread tensioning members mountedin the shuttle for movement to and from thread tensioning relation, so that on replenishment of filling such tensioning members shall be moved out of thread tensioning relation to free the outgoing filling end and to'receive the'incoming filling that it may be engaged by the tensioning members when they are again moved into thread tensioningrelation on the first pick of the shuttle following replenishment; so that on the first pick of the shuttle followingreplenishment the thread will be subjected to the same tensioning effect as existsin subsequent weaving.

The invention and new features thereof will best be made clear from the following description and the accompanying drawings of one good, practical form thereof. In the drawings:

Fig. 1 is a perspective view of an automati-' cally threading shuttle,shown in dotted lines, and provided with the presentinvention, the features of which are shown in full lines;

Fig. 2 is a sectional plan view of a shuttle containing the present invention; Fig. 3'is a View similar tothat of Fig. 2 but showing a filling carrier as having been transferred to the shuttle and illustrating the relation of the tensioning members before the shuttle is'picked following replenishment;

Fig. i'is an enlarged perspective view, with parts broken away, showing more particularly the features of the present invention with the tensioning members in threadtensioning relation; and

Fig. 5 is a section on Y the line 55 of.

The shuttle may be of any of the now wellknown filling replenishing types wherein the shuttle becomes threaded automatically as the shuttle is picked, and, asshownin the present-instancathe shuttle 1 has the usual bobbin chamber 2 and is provided with the'bobbinholding j aws3 whereby the filling carrier or bobbin maybe'detachably held in the shuttle." Forward of the bobbin chamberthe. shuttle isprovided witha thread passage constituted, in the present instance of the invention, by a cavity 4 communicating with a side delivery eye 5, and extending downwardly into the cavity 4 the woodofthe shuttle is formed. with a threading slot 6 communicating withthe/side delivery eye .5, so

that on the first pick of the shuttle follow ing replenishment the thread will pass down wardly through the slot 6 into the cavity 4 and thereafter be delivered from the side do livery eye. These features as thus far described may beof usualconstruction with the object of efiectingan automatic threading of the shuttle when replenishment has been effected and the shuttle is picked.

Mounted in the cavity 4 of the shuttle are the thread tensioning members which are relatively movable "into "and out of thread tensioning relation and such thread tensioning members may be variously-contrived, but in the present'instance of the invention one of the tensioning members consists of a series of pins 7 shown as vertically arranged between the top and bottom walls of the cavity 4 andat one'side of the opening or slot 6. The coacting tensioning member is shown in the present instance of the invention as movable relatively to the companion tensioning member and comprises an arm 8 having a series of laterally extending fingers 9 provided withiupwardly extending portions 10 arranged in staggered relation with the coacting tensioning member. The arm 8 is mounted for swinging movement on a pin 11 secured to the shuttle and is normally under the influence of a spring 12 tending to move the arm 8 laterally away from the pins or tensioning member 7. As shown, the spring 12 has one end thereof secured to a post 13 fixed to the shuttle and its other end at 14 hearing against a projection 15 preferably formed as part of the arm 8, the result being that when the spring 12 is at liberty to act upon the arm 8 the movable tensioning mem ber will be moved laterally relative to the coacting tensioning member into thread tensioning relation therewith. In the present instance the arm: 8'is connected? to the projection15'by the curvedportion 1 6 which passes about the pin 11, as more clearly indicated in Figs. 2 and 4'.

- iMounted for longitudinal movement at one side of the bobbin chamber is1a separator'l'l", the front end portion 18 ofwhich bears upon the projection 15 at one side of the pivotal mounting'of the arm 8. In order to guide the separator for longitudinal movement, a

pin or bolt 19 passesthrough a. slot 20 formed" in the separator,.and the forward end of the separator is embraced by a guide 21', the construction being such. that should the separator be moved forwardly'it will actupon the projection 15 and move the arm 8 with its attachediparts iuto non-tensioning relation.

with-respect to the co-acting-tensioningmem ber or pins 7, as indicated in Fig. 3.-

Pivot'ally mounted. atone side of the bobbin chamber at 22 is an actuator 23, the lower' end portion 24 of which bears upon the end of the separator 17 and connected tothe actuator 23 above its pivotal mounting, as at 25, is a rod 26 which extends longitudinally of" the shuttle at one side of the bobbin chamber and preferably in a: recess 27 formed. in the wall of the shuttle, the construction being such that should the rod 26 be moved backward or to :the left, as shown in the drawings, the actuator 23 will beturned upon its pivotal-mounting-to thereby move the separa tor 17 forwardly and turn the movable tensioning'member into non-tensioning relation with the co-actin'g tensioning member.

Secured to the wall of the shuttle at 28 at a point adjacent" the bobbin holding'jaws isa resilient member 29 provided with a bend 30 jaws to spring outwardlyasthe bobbinpasses downwardly into the shuttle and contacts with the top portion of the bobbin holding jaws, as indicated in Fig. 5. The bobbin holding jaws 3 are each supplied with ring holding recesses 34 which engage the bobbin holding rings 33 when the bobbin has been fully positioned in the shuttle. As the bobbin rings 33 pass downwardly under the impulse of the transferrer 35, as usual, the bobbin holdingjaws will be separated until the rings engage the recesses 34, when they will spring inwardly to some extent by reason of the grooves 34, the result being that as the bobbin passes downwardly in the position shown in Fig. 5, the bobbin holding jaws will be sprung outwardly, thereby acting upon the bend 30 of the resilient member 29 and cause its elongation towards the end of the shuttle opposite the tensioning members. Such elongation of the resilient member 29 will draw upon the rod 26, thereby turning the actuator 23 and efi'ecting longitudinal movement of the separator 17to effect movement of. the tensioning members out of thread tensioning position, and thus free the outgoing filling, end and permit the incoming filling to be positioned for engagement by the coacting tensioningmembers when the latter are again moved to thread tensioning position.

When the bobbin 32 has been fully transferred to the shuttle,- the bobbin holding jaws 3will move inward to some extent owing to thebobbin holding grooves therein, thereby causing the rod 26 to move forwardly or towards the. threading end of the shuttle, and

consequently the actuator 23 will be swung to permit the separator 17 to move backwardly. It is desirable at this time to prevent the tensioning members from moving to thread tensioning position, and for this purpose a lock is provided.

In the present instance of the invention, the lockconsists of an arm 36 pivotally mounted in the shuttle at 37 and having a turned end portion'38 adapted to engage behind'the projection 15 of the arm 8 when the latter has been moved into non-tensioning position, as indicated in Fig. 3. Movement of the lock intoit's locking positionis efiected by a finger 39 projecting. from the actuator 23, which is adapted to engage the end 40 of the lock when the actuator 23 is swung upon its pivotal mounting; to move the separator 17 forwardly and perforce turn thearm 8 into non-threadtensioning position, as indicated in Fig. 3.

This relative position of parts will be maintained by the lock after the fresh filling carrier or 'bobbinhas been inserted in the shuttle, sothat the incoming thread a may pass into position: for engagement by the tensioning' members when they are again relatively moved to thread tensioning position.

The present invention contemplates that the lock be trippedby the incoming filling as the shuttle'is pickedfrom. the replenishing box, ..ii

ent instance ofthe invetnion this is effected by anarm or bail 41 which is secured to the lock 36 at 42 and .the bail 41 extends laterally of the bobbin chamber in position to be engaged by the incoming thread a when.

replenishment has been effected. When the shuttle is picked fromthe replenishing shuttle box the swirling action of the thread a acting upon the bail 41,'trips the look, there by freeing the tensioning members forrelative movement into thread tensioning. osi-. tion, the thread at such time passing ack and forth between the tensioning members, so that on the first pick of the shuttle following replenishment the incoming thread is given the same tension that exists during subsequent weaving. The bail 41 may be secured to the lock. 36 in any approvedimanner, but, as indicated in the present instance of the invention, it is constituted as a spring arm which after tripping the lock remains out of active position. a V

From the construction described as one good practical embodiment of the present invention, it will be apparentthat when filling replenishment is effected, the'tensioning members will be moved out of thread ten'sionin relation and held in such position by the lock until the shuttle is picked from the replenishing shuttle box, whereupon the incoming thread a will act upon the bail 41, trip the lock as the thread unwinds from the bobbin and permit the tensioning members to again move into thread-tensioning relation.

It is apparent that the thread tensioning members may be variously contrived but the form thereof as indicated constitutes a good practical embodiment of the tesnioning members, and applicant believes himself to be the first in the art to cause the tensioning mem bers to be moved out of thread tensioning relation by the action of the bobbin jaws as replenishment is effected, and it is believed that applicant is likewise the first in the art to provide a lock for the tensioning members to maintain them out of thread tensioning relation until after the incoming thread has been positioned for engagement by the tensioning members before the shuttle is picked, and thereupon cause the lock to be tripped by the action of the new filling as it unwinds from the filling carrier or bobbin.

What is claimed is:

1. An automatically threading loom shuttle having a bobbin chamber and side delivery eye, ooacting thread tensioning members to exert tension on the thread and mounted for relative movement into and out of the thread tensioning position, means actuated on replenishment of filling for moving the tensioning members relatively out of thread tensioning position to permit the incoming thread tobe positioned for engagement by the tensioning members when they are again moved relatively into thread tensioningposition, a lock for holding the tensioning members'out of thread tensioning relation when moved to such relation on replenishment of filling, and means rendered effective by the incoming filling thread as the shuttle is. picked to trip the lock and permit the tensioning members to be moved relatively into thread tensioning position.

2. An automatically threading loomshuttle having a bobbin chamber and side delivery eye, ooacting thread tensioning members between the bobbin chamber and side delivery eye to' exert tension on the thread and mounted for relative movement into and out of the thread tensioning position, means actuated on replenishment of filling for moving the tension members relativelyout of thread tensioning position to permit the incoming thread to bepos'itioned for engagement by the'tensiom ing members when they are again moved relatively into thread tensioning position, a

device for holding the tensioning members in theirnon-tensioning relation when they have been moved into suchrelation on re- 1 thread and mounted for relative movement into and out of threadtensioning relation, means mounted for movement in a direction lengthwise of the shuttle by the bobbin holding jaws on replenishment offilling for moving the tensioning members relatively out of thread tensioning relation topermit' the incoming filling thread to be positioned for engagement by the tensioning members when they are moved into thread tensioning relation, and locking means for holding the tensioning members relatively out of thread tensioning relation until the shuttleis picked.

4. An automaticaily threading loom shuttle having a chamber for holding a yarn package, means fo-rpdetachably holding the yarn package in said chamber that the shuttle maybe replenished with filling, thread tensioning members to exert tension on the thread d-uring'weaving and mounted for relative movement into and out ofthread tensioning relation, a device mounted on the shuttle for movement longitudinally thereof by the yarn package holding means on re plenishment of filling for relatively moving the tensioning members out of thread tensioning relation, and a lock for holding the tensioning members out of tensioning relation until the shuttle .is pickedafter being replenished.

5. Anautomatically threadingloom shuttle having co-ac-ting thread tensionin-g members-to exert tension on the thread and mountedfor relative movement into and out of thread tensioning relation, means for mov ing the thread vtensioning members: out. of

thread tensioning relation on replenishment ofifilling to free the outgoing .thread and permit the incoming thread to be positioned forengagement by the tensioning members when they are moved into thread tensioning relation, a lock for holding thetensioning members out of thread tensioning relation, and a trip for the lockactuated by the filling thread to free the tensioning members from the lock and permit them to move relatively into thread tensioning relation.

1 6. An automatically threading loom shuttleihaving a bobbin chamber and side delivery eye, co-acting-thread tensioning members mounted vfor relativemovement into and out of thread tensioning relation, means actuated on replenishment of filling to move relatively thetensioning'members from thread tensioning relation to permit the incoming thread to be positioned for engagement by the tensioning members when they are again moved relatively into :tensioning relation, and-means rendered effective by the swirling thread as the shuttle is picked for relatively moving the tensioning members into thread tensioning relation.

7. An automatically threading loom shuttle having a bobbin chamber and bobbin holding jaws, co-acting thread tensioningrmemhers to exert tension on the thread and mounted for relative movement to and from thread tensioning relation, means actuated by movement ofthe bobbin holding jaws on replenishment of filling for relatively "moving the tensioning members out'o f thread ten sioning relation to free the outgoing thread and permit the incoming thread to be positioned between the tensioning members, a lock for holding t-he'tensi-oning members relatively out of thread tensioning relation, and means actuated by the thread as it is withdrawn from the shuttle to free the tensioning members that they may move relatively into thread tensioning relation.

8. An automatically threading loom shuttle having co-acting thread tensioning members, yielding means normally acting to cause the tensioning members to exert tension on the thread during Weaving, a separator actuated on replenishment of filling to separate the tensioning members in opposition to said normally acting yielding means to free the outgoing thread and permit the incoming thread to be positioned for the action of the tensioning members when they are again moved relatively into tensioning relation,

means for holding the tensioning members lowing replenishment to permit the tensioningfimem'bers to move relatively to thread tensioning relation.

9. An automatically threading loom shuttle having bobbin holding jaws, coacting thread tensioning members to exert tension on the thread and .mounted for relative movement into and out of thread tensioning relation,"means mounted for movement in a direction lengthwise of the shuttleand actuated by thebutt of the empty bobbin on replenishment of filling for moving the .tensioning "members relatively out of thread tensioning relation to permit the incoming filling thread to be positioned for engagement by the tensioning members when they are moved into thread tensioning relation and locking means for holding the tensioning members relatively out of thread tensioning relation until the shuttle is picked.

In testimony whereohl have signed my name to this specification.

VERNER 'LINDSJO. 

